Los senos paranasales son regiones huecas o bolsas que rodean la nariz. Secretan...
Los senos paranasales siempre vienen en pares de dos y se encuentran en cuatro Ã...
A sinus infection generally occurs when the nasal cavities become infected, infl...
Sinuses are hollow regions or pockets surrounding your nose. They secrete mucus ...
Sinuses always come in pairs of two and are found in four main areas of the face...
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